Arguably the most popular tool in cycling.

When making adjustments to your bike, the three most common hex sizes are 4, 5, and 6mm. Park Tool, being the savvy purveyor of bicycle repair equipment that it is, developed what's quite possibly the most iconic shop tool ever -- the 3-Way Hex Wrench.

Known internally at Park Tool as the AWS-1, and to mechanics worldwide as a 'Y-wrench,' this three-way has 4, 5, and 6mm hex wrenches. Each are bonded to a sturdy plastic center handle in order to ensure a firm grip. And by having three sizes instantly available, you'll spend less time fumbling around, and more time fixing things.

Excellent Y tool.

Comment on Peter Hamm's review:

Not the 3 Way you are thinking

Familiarity:
I've put it through the wringer

As a home mechanic, I got by just fine using a multitool for pretty much all my repairs as I had basically everything I needed all in one tool. While it worked well, fiddling between different sizes got old and I realized there was a better way. This is that better way. Not only do you have the most commonly used sizes all on one simple tool, you can apply torque much better for them. This tool is definitely something that is a staple to have in your toolbox for wrenching.

Comment on Kevin K's review:

#1 tool for bike repairs

Familiarity:
I've put it through the wringer

Out on the road, a multitool is king, but in a shop, the 3 way hex wrench is king. There are very few bolts that you'll frequently adjust that will not fit one of these 3 heads. The nice wide grip gives you enough torque to loosen even the toughest bolt. I would recommend using a torque wrench to tighten all of the bolts, but a 4,5,6 3 way is great to have.